Smoke-condenser.



Patented June 20, 1916.

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F. BREITE NSTEIN.

SMOKE CONDENSER. APPLICATION mm NOV}. n, ma.

Patented June 20, 1916.

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F. W. BREITENSTEINI.

SMOKE CONDENSER.

'APPLICATION FILED NOV. 11, m3.

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.. ENT or FRIEDRICH w. BREITENSTEIN, on vAnooUvEa, BRITISH COLUMBIA, CANADA.

SMOKE-CONDENSER.

Specification of Letters Patent.

Patented June 20, 1916.

Application filed November 11, 1913. Serial No. 800,403.

To all whom it may concern:

Be it known that I, FRIEDRICH W. BREITEN- s'rnm, a citizen of Canada, residing at Vancouver, in the Province of British Columbia and Dominion of Canada, have invented new and useful Improvements in Smoke- Condensers, of which the following is a specification.

The present invention relates to an improved device for. treating metallurgical smoke, such as the smoke or exit gases from smelting furnaces and the like, for the pur comfort and injury to the animal life in the neighborhood of the smelter. In accordance with the present invention, the arsenic and sulfur are recovered from the smelter smoke,

in the form respectively of free sulfur and arsenic trioxid, both of which are solids.

The device comprises essentially, a long flue connected to the gas outlet of'the smelting furnace, and provided at points intermediate its ends, with means for projecting flames into said flue, for reducing the sulfur dioxid contained in the smelter smoke, and for reducing the higher oXids of arsenic to arsenic trioxid. The device also includes a stack or chimney, into which the gases are led, after being treated in said flue. The flue and stack are both provided, at suitable points, with clean out doors, for the removal of precipitated matter. The invention furthercomprises the construction, combination and arrangement of parts, as hereinafter described and claimed.

In the accompanying drawings :Figure 1 is a diagrammatic elevation of a smoke condenser constructed in accordance with my invention. of the same. Fig. 3 is a horizontal sectional plan on a larger scale of the intake half or approximately half of my improved smoke condenser. Fig. 4: is a similar view of the discharge half thereof. Fig. 5. is a detail longitudinal sectional view, on a'larger scale, of one of the fire places and associated parts. Fig. 6 is a detail vertical sectional View of the same. Fig. 7 is a detail hori- In the ordinary Fig. 2 is a diagrammatic plan zontal sectional View of the terminal portion of the tortuous flue and the base portion of the stackv 1 In accordance with my invention, I provide a flue 1 which, in practice, might, in some cases, be about five hundred and fifty feet long and is subterranean. This flue is tortuous and, in practice, is preferably built of hard brick, lined with fire brick laid in fireclay. The stack 2 into which the outlet end of the flue 1 discharges is also preferably built of hard brick lined with fire brick and extends about 150 feet above grade and is provided with a door 3 to enable an entrance 'to be effected into the lower portion of the stack for clean out purposes and permit the recovery of the sulfur and arsenic deposited therein. The flue 1 is arched, bemg substantially semi-circular in cross sectlon and being provided with a flat floor 4 which is preferably made of concrete.

The flue is tortuous and comprises a series 7 of sections 5 each of which comprises an intake lead 6 and a discharge lead 7 arranged at an angle to the intake lead, the discharge leads ofall the sections of the flue being preferably parallel. The intake lead of each section of the flue is open and the discharge lead ofeach section 18 connected to the intake lead of the next section at a point.

somewhat to the rear of the front end of said intake lead.

The intake leads 8 of the first section 9 of the flue are arranged at an angle to each other andconverge and discharge into the discharge'lead 6 of the first section 5 and these intake leads 8 are provided with smoke connections 10 which lead from the smelter so that the smelter smoke is first discharged into the initial intakeleads 8 of the flue 1. In front of each intake lead of the flue, in all the sections thereof, is a fireplace 11, the

. said fireplaces being, in practice, and here shown as basement structures of suitable dimensions, provided with steps 12 entrance doors 13 and roofs l4, and in each fireplace is a suitable oil pump 15 connected by a pipe 16 with an oil tank 17, a suitable number of these oil tanks being provided, as shown, and the oil tanks also being nearly subterranean and belng preferably made of concrete.

The walls and floors of the fireplaces may be made of brick, concrete or other suitable material. Each fireplace is provided, within the scope of my invention, with means for.

projecting flame into and rearwardly through the intake lead of the flue section with Which the fireplace communicates and preferably oil burners 18 are employed for this purpose, the oil burners being installed in the fireplaces at the front ends of the intake leads of the flue sections, the nozzles 19 of the oil burners projecting rearwardly in and through the walls at the front ends of said intake leads and the said oil burners being supplied with crude oil or other suitable liquid hydrocarbon by the oil pumps 15 and with air by air pipes 20. These oil burners may be of any suitable type and for this reason are not more fully herein described as any form of oil burners may be used. In practice, an iron front 21 will be employed in each fireplace at the front end of the intake lead of the flue with Which the fireplace communicates, the said iron front being provided with suitable doors 22 to open or close communication with the intake lead.

Each intake lead of the flue is provided in one of its side walls with a clean out opening 23 to afi'ord access thereto and with a door or other suitable closure 24 for. said clean out opening. erably sixteen by sixteen feet in plan, eight feet in height at the rear end or wall and each lead of the flue is preferably six feet wide in the clear between its walls and about four feet eight inches high between its floor and arch, and, hence, is of suflicient capacity for the passage of the smelter smoke there through and to enable attendants to enter and clean up the leads of the flue.

In the operation of my improved apparatus, the chimney 2 produces a flow of gases from the smelting furnace through the length of the flue. This causes the smoke from the smelter to be drawn in through the pipes 10, and to traverse the length of the flue. take lead of each section and is there subjected to the reducing action of'the flame he fireplaces are pref The smelter smoke enters the in:

from one of the burners, projected into each of the various intake leads of the furnace sections as above described. The action of the flame is to reduce the sulfur dioxid to free sulfur, and to reduce arsenic pentoxid, arsenic acid, or arsenates carried 1nechani cally by the gases to form arsenic trioXid which material readily settles out from the gases, as a white solid, accompanied by the free sulfur, and by material quantities of the solid materials carried by the smelter smoke, such as flue dust and the like.

It will be understood from the foregoing description and by reference to Figs. 3 and 4 of the drawing that owing to the construction of the flue and the arrangement of the burners, the latter project flame into a flue at the angles in the flue. Hence the flame is driven through and across the smoke at various points intermediate the ends of the flue so that all particles carried by the smoke are brought into contact with the flame.

I find in practice, that it is essential to have the flue at least five hundred feet long and have obtained the most satisfactory results from one whichI constructed five hundred and fifty feet long.

I claim p A smoke condenser and sulfur and arsenic recoverer for sinelters comprising a smoke flue leading from the smelter and composed of a series ofconnected sections each having an intake lead and a discharge lead at an angle to the intake lead at a point to the rear of the front end of said intake lead, and means at the front endof each intake lead to project flame into said intake lead and toward the rear of said flue.

In testimony whereof I aflix my signature in presence of two Witnesses.

FRIEDRICH W. BREITENSTEIN.

Witnesses J. DONALD CAMPBELL, Hnnwic E. DEUKERT.

fiopics of this patent may be obtained for five cents each, by addressing the Commissioner of Patents.

, Washington, D. G." 

